Reduced Graphene Oxide-Cu0.5Ni0.5Fe2O4-Polyaniline Nanocomposite: Preparation, Characterization and Microwave Absorption Properties

Dat, Tran Quang; Hà, Nguyễn Trần; Hung, Do Quoc

doi:10.1007/s11664-017-5386-z

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…The obtained values for the mechanical properties in this study are comparable to the values of strength of composite structures reported in the literature [51]. Therefore, the E-glass/epoxy/MWCNTs/ NZF nanocomposite synthesised in this work could be utilised directly for applications that require sufficient mechanical strength and thermal stability, instead of using RASs using wax, paraffin, and rubber as the matrix materials [19,44,53,54]. The combination of the advantages of each component in the epoxy/Eglass reinforced MWCNTs/NZF nanocomposite into a single ideal unit resulted in an efficient RAS that can absorb microwave radiation, as well as exhibits good mechanical and thermal properties.…”

Section: Mechanical Propertiessupporting

confidence: 84%

“…In general, magnetic loss at higher frequencies in a lossy material occurs due to the exchange resonance, natural resonance, and eddy current effect. The loss caused by the eddy current effect is related to the thickness (d) and electrical conductivity (σ) of the composites, and is expressed by , where is the permeability of vacuum [18, 44-46]. If the values of remain constant even when the frequency changes, it can be inferred that eddy current effects cause the magnetic loss.…”

Section: Resultsmentioning

confidence: 99%

“…, where m 0 is the permeability of vacuum [18,[44][45][46]. If the values of m ′′ (m ′ ) −2 f −1 remain constant even when the frequency changes, it can be inferred that eddy current effects cause the magnetic loss.…”

Section: Electromagnetic Characteristicsmentioning

confidence: 99%

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X-band radar-absorbing structures based on MWCNTs/NiZn ferrite nanocomposites

Nagasree¹,

Ramji

Naidu

et al. 2020

Plastics, Rubber and Composites

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Microwave absorbers present a wide range of applications in radar and telecommunications. To improve the microwave absorption characteristics of radar-absorbing structures (RASs), magnetic and dielectric materials are blended in different proportions because the impedance mismatch of dielectric materials, resulting from poor permeability, can be eliminated by a combination with magnetic loss fillers. Herein, E-glass/epoxy composites were prepared by blending multi-walled carbon nanotubes (MWCNTs) with Ni 0.5 Zn 0.5 Fe 2 O 4 (NZF) nanopowder to enhance the composites' microwave absorption. Nanocomposite laminates with different filler contents were fabricated by a simple and low-cost process of in situ polymerisation. The dielectric characteristics were estimated in the X-band, and possible loss mechanisms were studied. A two-layered RAS exhibited a reflection loss of −16 dB for a bandwidth of 2.2 GHz with a matching thickness of 3 mm. The resulting mechanical and thermal properties suggest that the proposed MWCNTs/NZF composite exhibiting good microwave absorption properties can be used in high-performance RASs.

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Section: Mechanical Propertiessupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

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X-band radar-absorbing structures based on MWCNTs/NiZn ferrite nanocomposites

Nagasree¹,

Ramji

Naidu

et al. 2020

Plastics, Rubber and Composites

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“…It has been found that the permittivity of Cu 0.5 Ni 0.5 Fe 2 O 4 ferrite at the frequency of 1 kHz is about four times higher than that of NiFe 2 O 4 [8]. In addition, according to the findings of Dat et al [9], the saturation magnetization of Cu 0.5 Ni 0.5 Fe 2 O 4 nanoparticles was observed to be approximately twice as high as that of NiFe 2 O 4 nanoparticles. Furthermore, NiCu ferrites possess desirable characteristics such as high electrical resistivity, low eddy currents, and low hysteresis loss, which make them suitable candidates for use in transformers and surface mount devices (SMDs) [10].…”

Section: Introductionmentioning

confidence: 90%

Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process

Maghazei,

Gheisari,

Ranjbar

et al. 2023

Phys. Scr.

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In this study, the plasma arc discharge process was employed to synthesize nanocrystalline Cu0.5Ni0.5Fe2O4 ferrite powders. The formation of a spinel-type structure of ferrite has been confirmed using X-ray diffraction. X-ray diffraction analysis conclusively verified the formation of a spinel-type ferrite structure. The investigation involved studying the frequency and temperature dependence of dielectric permittivity, dielectric loss, and DC/AC conductivity over a broad frequency range (1 kHz–1 MHz) in a temperature range of 298 K–403 K. The highest value of the dielectric contestant (4746) is observed at a frequency of 1 kHz and temperature of 313 K. A maximum in the DC conductivity is observed at 403 K, which can be ascribed to the combined effects of thermally activated hopping and an increase in the concentration of both n-type and p-type charge carriers at higher temperatures.

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“…In our previous reports, reduced graphene oxide -Cu 0.5 Ni 0.5 Fe 2 O 4 ferritepolyaniline (RGO/CNF/PANI) composite have been prepared by a three-step method [7]. The purpose of this work is to investigate the feasibility of adsorption of uranium (VI) by this material.…”

mentioning

confidence: 99%

Rgo/CNF/Pani as an Effective Adsorbent for the Adsorption of Uranium From Aqueous Solution

Dat¹

2018

JST

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In this paper, we present a recent study in the adsorption of uranium from an aquatic environment by reduced graphene oxide - Cu0.5Ni0.5Fe2O4 ferrite – polyaniline (RGO/CNF/PANI) composite. Uranium concentration was carried out by batch techniques. The effect of pH, contact time, concentration of equilibrium state and reusability on uranium adsorption capacity have been studied. The adsorption process was accomplished within 240 min and could be well described by the pseudo-second-order model. The adsorption isotherm agrees well with the Langmuir model, having a maximum adsorption capacity of 2000 mg/g, at pH = 5 and 25 oC. The RGO/CNF/PANI materials could be a promising absorbent for removing U (VI) in aqueous solution because of their high adsorption capacity and convenient magnetic separation.

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Reduced Graphene Oxide-Cu0.5Ni0.5Fe2O4-Polyaniline Nanocomposite: Preparation, Characterization and Microwave Absorption Properties

Cited by 11 publications

References 19 publications

X-band radar-absorbing structures based on MWCNTs/NiZn ferrite nanocomposites

X-band radar-absorbing structures based on MWCNTs/NiZn ferrite nanocomposites

Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process

Rgo/CNF/Pani as an Effective Adsorbent for the Adsorption of Uranium From Aqueous Solution

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Reduced Graphene Oxide-Cu0.5Ni0.5Fe2O4-Polyaniline Nanocomposite: Preparation, Characterization and Microwave Absorption Properties

Cited by 11 publications

References 19 publications

X-band radar-absorbing structures based on MWCNTs/NiZn ferrite nanocomposites

X-band radar-absorbing structures based on MWCNTs/NiZn ferrite nanocomposites

Magnetic and electrical transport properties of Cu0.5Ni0.5Fe2O4 ferrite synthesized by plasma arc discharge process

Rgo/CNF/Pani as an Effective Adsorbent for the Adsorption of Uranium From Aqueous Solution

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Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process